My Deep-sea Fishery

Fang Youqun was taken aback when he heard the words.

Chen Qingsheng also stared in surprise, "Fifty meters? Captain, are you kidding me?"

Xiang Yang shook his head and said truthfully: "I'm not kidding, the longest sting jellyfish's tentacles can indeed grow up to 50 meters."

In many people's minds, jellyfish are small, cute, but simple marine creatures with toxins.

But Xiang Yang, who is familiar with jellyfish, knows that the horror of jellyfish is far more than that.

Especially the giant Echizen jellyfish that appeared in Dongyi waters in recent years.

Echizen jellyfish are more annoyingly greedy than other jellyfish.

And Echizen jellyfish is terrible.

The largest Echizen jellyfish can grow up to two meters in diameter and weigh 200 kilograms.

An adult Echizen jellyfish can eat all the plankton in a large swimming pool in one day. As long as the Echizen jellyfish appears, there is no place for fish to survive.

Thinking of this, Xiang Yang shook his head and said with emotion: "In the huge ocean, fish have always lived at the top of the food chain. Even when there are dinosaurs and nautilus, the ocean is dominated by fish. For thousands of years, fish have never lost to any other marine life. I did not expect that now because of the emergence of Echizen jellyfish, fish actually lost to jellyfish."

"This is no way, Echizen jellyfish is really terrible." Xia Pengjie said.

In fact, Echizen jellyfish are also found in our country's territorial waters.

Echizen jellyfish is called sand jellyfish in our country, and it also frequently appears in our waters.

Because Echizen jellyfish is too destructive to my country's fishery resources, my country has long been breeding and observing Echizen jellyfish as the main jellyfish sample to be studied by the Chinese Academy of Sciences.

Scientists have discovered after research that the polyp of Echizen jellyfish has amazing predation ability as well as amazing reproduction ability.

Different jellyfish have different reproductive methods, and Echizen jellyfish can also reproduce in foot sacs.

When the hydrops of Echizen jellyfish sink to the seabed, they can move on the attached crops. While moving, they can leave some tissues, which researchers call pouches, and these pouches can reproduce more polyps.

This method of self-replication and asexual reproduction is enough to allow the first 100,000 fertilized eggs to evolve into billions of polyps.

When the polyp grows further, stacks of small jellyfish will split up one by one, and the final number will reach tens of billions.

Echizen jellyfish has such an abnormal reproduction method, which must have been an important reason for the outbreak of jellyfish over the years.

But Xiang Yang felt that this was definitely not the main reason for the jellyfish outbreak.

Because although Echizen jellyfish is a newly discovered jellyfish, it is not a new type of jellyfish. It has existed in the ocean for hundreds of millions of years.

If just relying on reproductive power can cause the jellyfish to explode, then this ocean was dominated by jellyfish hundreds of millions of years ago.

Of course, not all jellyfish are as scary as Echizen jellyfish.

Some jellyfish are very small and amazing.

Xiang Yang had seen a jellyfish called the lighthouse jellyfish before.

Compared with the huge size of the Echizen jellyfish, the lighthouse jellyfish is very small, only about five millimeters in diameter.

The lighthouse jellyfish is very magical. It is a real longevity creature. They can rejuvenate, become larvae, and then grow again, which is incredible.

Many scientists around the world are studying why the life of the lighthouse jellyfish can live forever and live forever.

Of course, compared with the illusory immortality of the lighthouse jellyfish, the first thing human beings do is to solve the harm caused by the jellyfish to humans.

After analysis, scientists discovered that the hydrop of jellyfish is not only large in number, but also has another characteristic, that is, dormancy.

When the external conditions are not suitable, the polyp can dormant on the seabed for decades and wait until the time is right before it starts to move.

Based on this characteristic of the polyp, Xiang Yang believes that the main cause of the jellyfish outbreak in recent years is the change of the environment.

The seawater temperature in the coastal waters of my country has been increasing year by year, and there are some subtle changes that have been going on for many years.

From 1980 to the present, the average eutrophication of my country's offshore waters has increased three times, Xiang Yang believes this is also one of the main reasons for the outbreak of jellyfish.

In the past sixty years, humans have obtained hundreds of millions of tons of fish from the ocean. These are all wild animals, not human farmed.

At the same time, humans discharged more than one billion tons of garbage into the ocean, causing great changes in the entire ocean.

The rapid development of human society has produced a large amount of industrial and domestic garbage, and sewage discharge has led to more and more surplus nutrients in the ocean.

As a result, algae blooms, red tides and Enteromorpha are popular.

As a result, algae plants provide sufficient food for plankton, plankton multiplies, and jellyfish that feed on plankton begin to dominate.

In the past, the marine food chain has always been a pyramid structure. From diatoms and single-celled plants at the bottom to large fish and marine mammals at the top, this structure has been stable for hundreds of millions of years.

However, the outbreak of jellyfish populations has caused them to rob plankton in a big way, making fish lack of food sources, and the marine food chain has been broken.

Xiang Yang said: "Regardless of whether the jellyfish outbreak is caused by global warming or overfishing and ocean eutrophication, I think that humans will ultimately be responsible for the consequences of excessive expropriation of nature. Therefore, since I have encountered these sting jellyfish, Then it is necessary to catch some up no matter what."

"I support the captain's approach." Chen Qingsheng was the first to express his opinion.

"I also support." Fang Youqun shouted loudly.

Xiang Yang smiled slightly, "If this is the case, then start salvaging. Remember, you must pay attention to your own safety. In the salvage process, you must wear protective clothing from beginning to end."

With that said, Xiang Yang put on his helmet and took a fish rake, heading towards the sea.

These sting jellyfish are actually very easy to catch.

Their bodies are very soft, just like plastic bags, and at least 90% of their bodies are filled with water.

I got closer, and I used a long rod with a hook to fish into the water. As long as the sting jellyfish was caught by the hook, just hold the rod and pull it to the deck. There is absolutely no possibility of running away.

There are a lot of sting jellyfish in this water area, and they only have a lot of fat. They are the best among sting jellyfish.

Soon, Xiang Yang waved the fish rake and fished dozens of sting jellyfish from the sea.

Because this job had no technical content and was the reason for the physical effort, Chen Qingsheng and the others fished even more than Xiang Yang. Soon, several water tanks on the ship were filled with sting jellyfish.